According to a study from ucs the average cost of fuel annual is & 770 lower for electric vehicles than gas-powered vehicles. the maintenance cost is similar to this number or approximately $500 annually. an electric car is around $2500 more expensive than a similar gas-powered vehicle when the car is first purchased. how many years will it take for the electric car to be less expensive to operate and maintain than a gas-powered vehicle?

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?